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Merge branch 'akpm' (patches from Andrew)
[mirror_ubuntu-zesty-kernel.git] / fs / ocfs2 / super.c
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #include <linux/module.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/init.h>
32 #include <linux/random.h>
33 #include <linux/statfs.h>
34 #include <linux/moduleparam.h>
35 #include <linux/blkdev.h>
36 #include <linux/socket.h>
37 #include <linux/inet.h>
38 #include <linux/parser.h>
39 #include <linux/crc32.h>
40 #include <linux/debugfs.h>
41 #include <linux/mount.h>
42 #include <linux/seq_file.h>
43 #include <linux/quotaops.h>
44 #include <linux/cleancache.h>
45
46 #define CREATE_TRACE_POINTS
47 #include "ocfs2_trace.h"
48
49 #include <cluster/masklog.h>
50
51 #include "ocfs2.h"
52
53 /* this should be the only file to include a version 1 header */
54 #include "ocfs1_fs_compat.h"
55
56 #include "alloc.h"
57 #include "aops.h"
58 #include "blockcheck.h"
59 #include "dlmglue.h"
60 #include "export.h"
61 #include "extent_map.h"
62 #include "heartbeat.h"
63 #include "inode.h"
64 #include "journal.h"
65 #include "localalloc.h"
66 #include "namei.h"
67 #include "slot_map.h"
68 #include "super.h"
69 #include "sysfile.h"
70 #include "uptodate.h"
71 #include "xattr.h"
72 #include "quota.h"
73 #include "refcounttree.h"
74 #include "suballoc.h"
75
76 #include "buffer_head_io.h"
77
78 static struct kmem_cache *ocfs2_inode_cachep;
79 struct kmem_cache *ocfs2_dquot_cachep;
80 struct kmem_cache *ocfs2_qf_chunk_cachep;
81
82 /* OCFS2 needs to schedule several different types of work which
83 * require cluster locking, disk I/O, recovery waits, etc. Since these
84 * types of work tend to be heavy we avoid using the kernel events
85 * workqueue and schedule on our own. */
86 struct workqueue_struct *ocfs2_wq = NULL;
87
88 static struct dentry *ocfs2_debugfs_root;
89
90 MODULE_AUTHOR("Oracle");
91 MODULE_LICENSE("GPL");
92 MODULE_DESCRIPTION("OCFS2 cluster file system");
93
94 struct mount_options
95 {
96 unsigned long commit_interval;
97 unsigned long mount_opt;
98 unsigned int atime_quantum;
99 signed short slot;
100 int localalloc_opt;
101 unsigned int resv_level;
102 int dir_resv_level;
103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
104 };
105
106 static int ocfs2_parse_options(struct super_block *sb, char *options,
107 struct mount_options *mopt,
108 int is_remount);
109 static int ocfs2_check_set_options(struct super_block *sb,
110 struct mount_options *options);
111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
112 static void ocfs2_put_super(struct super_block *sb);
113 static int ocfs2_mount_volume(struct super_block *sb);
114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
116 static int ocfs2_initialize_mem_caches(void);
117 static void ocfs2_free_mem_caches(void);
118 static void ocfs2_delete_osb(struct ocfs2_super *osb);
119
120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
121
122 static int ocfs2_sync_fs(struct super_block *sb, int wait);
123
124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
127 static int ocfs2_check_volume(struct ocfs2_super *osb);
128 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
129 struct buffer_head *bh,
130 u32 sectsize,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_initialize_super(struct super_block *sb,
133 struct buffer_head *bh,
134 int sector_size,
135 struct ocfs2_blockcheck_stats *stats);
136 static int ocfs2_get_sector(struct super_block *sb,
137 struct buffer_head **bh,
138 int block,
139 int sect_size);
140 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
141 static void ocfs2_destroy_inode(struct inode *inode);
142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
143 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
144 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
145
146 static struct dquot **ocfs2_get_dquots(struct inode *inode)
147 {
148 return OCFS2_I(inode)->i_dquot;
149 }
150
151 static const struct super_operations ocfs2_sops = {
152 .statfs = ocfs2_statfs,
153 .alloc_inode = ocfs2_alloc_inode,
154 .destroy_inode = ocfs2_destroy_inode,
155 .drop_inode = ocfs2_drop_inode,
156 .evict_inode = ocfs2_evict_inode,
157 .sync_fs = ocfs2_sync_fs,
158 .put_super = ocfs2_put_super,
159 .remount_fs = ocfs2_remount,
160 .show_options = ocfs2_show_options,
161 .quota_read = ocfs2_quota_read,
162 .quota_write = ocfs2_quota_write,
163 .get_dquots = ocfs2_get_dquots,
164 };
165
166 enum {
167 Opt_barrier,
168 Opt_err_panic,
169 Opt_err_ro,
170 Opt_intr,
171 Opt_nointr,
172 Opt_hb_none,
173 Opt_hb_local,
174 Opt_hb_global,
175 Opt_data_ordered,
176 Opt_data_writeback,
177 Opt_atime_quantum,
178 Opt_slot,
179 Opt_commit,
180 Opt_localalloc,
181 Opt_localflocks,
182 Opt_stack,
183 Opt_user_xattr,
184 Opt_nouser_xattr,
185 Opt_inode64,
186 Opt_acl,
187 Opt_noacl,
188 Opt_usrquota,
189 Opt_grpquota,
190 Opt_coherency_buffered,
191 Opt_coherency_full,
192 Opt_resv_level,
193 Opt_dir_resv_level,
194 Opt_journal_async_commit,
195 Opt_err,
196 };
197
198 static const match_table_t tokens = {
199 {Opt_barrier, "barrier=%u"},
200 {Opt_err_panic, "errors=panic"},
201 {Opt_err_ro, "errors=remount-ro"},
202 {Opt_intr, "intr"},
203 {Opt_nointr, "nointr"},
204 {Opt_hb_none, OCFS2_HB_NONE},
205 {Opt_hb_local, OCFS2_HB_LOCAL},
206 {Opt_hb_global, OCFS2_HB_GLOBAL},
207 {Opt_data_ordered, "data=ordered"},
208 {Opt_data_writeback, "data=writeback"},
209 {Opt_atime_quantum, "atime_quantum=%u"},
210 {Opt_slot, "preferred_slot=%u"},
211 {Opt_commit, "commit=%u"},
212 {Opt_localalloc, "localalloc=%d"},
213 {Opt_localflocks, "localflocks"},
214 {Opt_stack, "cluster_stack=%s"},
215 {Opt_user_xattr, "user_xattr"},
216 {Opt_nouser_xattr, "nouser_xattr"},
217 {Opt_inode64, "inode64"},
218 {Opt_acl, "acl"},
219 {Opt_noacl, "noacl"},
220 {Opt_usrquota, "usrquota"},
221 {Opt_grpquota, "grpquota"},
222 {Opt_coherency_buffered, "coherency=buffered"},
223 {Opt_coherency_full, "coherency=full"},
224 {Opt_resv_level, "resv_level=%u"},
225 {Opt_dir_resv_level, "dir_resv_level=%u"},
226 {Opt_journal_async_commit, "journal_async_commit"},
227 {Opt_err, NULL}
228 };
229
230 #ifdef CONFIG_DEBUG_FS
231 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
232 {
233 struct ocfs2_cluster_connection *cconn = osb->cconn;
234 struct ocfs2_recovery_map *rm = osb->recovery_map;
235 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
236 int i, out = 0;
237
238 out += snprintf(buf + out, len - out,
239 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
240 "Device", osb->dev_str, osb->uuid_str,
241 osb->fs_generation, osb->vol_label);
242
243 out += snprintf(buf + out, len - out,
244 "%10s => State: %d Flags: 0x%lX\n", "Volume",
245 atomic_read(&osb->vol_state), osb->osb_flags);
246
247 out += snprintf(buf + out, len - out,
248 "%10s => Block: %lu Cluster: %d\n", "Sizes",
249 osb->sb->s_blocksize, osb->s_clustersize);
250
251 out += snprintf(buf + out, len - out,
252 "%10s => Compat: 0x%X Incompat: 0x%X "
253 "ROcompat: 0x%X\n",
254 "Features", osb->s_feature_compat,
255 osb->s_feature_incompat, osb->s_feature_ro_compat);
256
257 out += snprintf(buf + out, len - out,
258 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
259 osb->s_mount_opt, osb->s_atime_quantum);
260
261 if (cconn) {
262 out += snprintf(buf + out, len - out,
263 "%10s => Stack: %s Name: %*s "
264 "Version: %d.%d\n", "Cluster",
265 (*osb->osb_cluster_stack == '\0' ?
266 "o2cb" : osb->osb_cluster_stack),
267 cconn->cc_namelen, cconn->cc_name,
268 cconn->cc_version.pv_major,
269 cconn->cc_version.pv_minor);
270 }
271
272 spin_lock(&osb->dc_task_lock);
273 out += snprintf(buf + out, len - out,
274 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
275 "WorkSeq: %lu\n", "DownCnvt",
276 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
277 osb->blocked_lock_count, osb->dc_wake_sequence,
278 osb->dc_work_sequence);
279 spin_unlock(&osb->dc_task_lock);
280
281 spin_lock(&osb->osb_lock);
282 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
283 "Recovery",
284 (osb->recovery_thread_task ?
285 task_pid_nr(osb->recovery_thread_task) : -1));
286 if (rm->rm_used == 0)
287 out += snprintf(buf + out, len - out, " None\n");
288 else {
289 for (i = 0; i < rm->rm_used; i++)
290 out += snprintf(buf + out, len - out, " %d",
291 rm->rm_entries[i]);
292 out += snprintf(buf + out, len - out, "\n");
293 }
294 spin_unlock(&osb->osb_lock);
295
296 out += snprintf(buf + out, len - out,
297 "%10s => Pid: %d Interval: %lu\n", "Commit",
298 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
299 osb->osb_commit_interval);
300
301 out += snprintf(buf + out, len - out,
302 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
303 "Journal", osb->journal->j_state,
304 osb->journal->j_trans_id,
305 atomic_read(&osb->journal->j_num_trans));
306
307 out += snprintf(buf + out, len - out,
308 "%10s => GlobalAllocs: %d LocalAllocs: %d "
309 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
310 "Stats",
311 atomic_read(&osb->alloc_stats.bitmap_data),
312 atomic_read(&osb->alloc_stats.local_data),
313 atomic_read(&osb->alloc_stats.bg_allocs),
314 atomic_read(&osb->alloc_stats.moves),
315 atomic_read(&osb->alloc_stats.bg_extends));
316
317 out += snprintf(buf + out, len - out,
318 "%10s => State: %u Descriptor: %llu Size: %u bits "
319 "Default: %u bits\n",
320 "LocalAlloc", osb->local_alloc_state,
321 (unsigned long long)osb->la_last_gd,
322 osb->local_alloc_bits, osb->local_alloc_default_bits);
323
324 spin_lock(&osb->osb_lock);
325 out += snprintf(buf + out, len - out,
326 "%10s => InodeSlot: %d StolenInodes: %d, "
327 "MetaSlot: %d StolenMeta: %d\n", "Steal",
328 osb->s_inode_steal_slot,
329 atomic_read(&osb->s_num_inodes_stolen),
330 osb->s_meta_steal_slot,
331 atomic_read(&osb->s_num_meta_stolen));
332 spin_unlock(&osb->osb_lock);
333
334 out += snprintf(buf + out, len - out, "OrphanScan => ");
335 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
336 os->os_count, os->os_seqno);
337 out += snprintf(buf + out, len - out, " Last Scan: ");
338 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
339 out += snprintf(buf + out, len - out, "Disabled\n");
340 else
341 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
342 (get_seconds() - os->os_scantime.tv_sec));
343
344 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
345 "Slots", "Num", "RecoGen");
346 for (i = 0; i < osb->max_slots; ++i) {
347 out += snprintf(buf + out, len - out,
348 "%10s %c %3d %10d\n",
349 " ",
350 (i == osb->slot_num ? '*' : ' '),
351 i, osb->slot_recovery_generations[i]);
352 }
353
354 return out;
355 }
356
357 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
358 {
359 struct ocfs2_super *osb = inode->i_private;
360 char *buf = NULL;
361
362 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
363 if (!buf)
364 goto bail;
365
366 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
367
368 file->private_data = buf;
369
370 return 0;
371 bail:
372 return -ENOMEM;
373 }
374
375 static int ocfs2_debug_release(struct inode *inode, struct file *file)
376 {
377 kfree(file->private_data);
378 return 0;
379 }
380
381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
382 size_t nbytes, loff_t *ppos)
383 {
384 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
385 i_size_read(file->f_mapping->host));
386 }
387 #else
388 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
389 {
390 return 0;
391 }
392 static int ocfs2_debug_release(struct inode *inode, struct file *file)
393 {
394 return 0;
395 }
396 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
397 size_t nbytes, loff_t *ppos)
398 {
399 return 0;
400 }
401 #endif /* CONFIG_DEBUG_FS */
402
403 static const struct file_operations ocfs2_osb_debug_fops = {
404 .open = ocfs2_osb_debug_open,
405 .release = ocfs2_debug_release,
406 .read = ocfs2_debug_read,
407 .llseek = generic_file_llseek,
408 };
409
410 static int ocfs2_sync_fs(struct super_block *sb, int wait)
411 {
412 int status;
413 tid_t target;
414 struct ocfs2_super *osb = OCFS2_SB(sb);
415
416 if (ocfs2_is_hard_readonly(osb))
417 return -EROFS;
418
419 if (wait) {
420 status = ocfs2_flush_truncate_log(osb);
421 if (status < 0)
422 mlog_errno(status);
423 } else {
424 ocfs2_schedule_truncate_log_flush(osb, 0);
425 }
426
427 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
428 &target)) {
429 if (wait)
430 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
431 target);
432 }
433 return 0;
434 }
435
436 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
437 {
438 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
439 && (ino == USER_QUOTA_SYSTEM_INODE
440 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
441 return 0;
442 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
443 && (ino == GROUP_QUOTA_SYSTEM_INODE
444 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
445 return 0;
446 return 1;
447 }
448
449 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
450 {
451 struct inode *new = NULL;
452 int status = 0;
453 int i;
454
455 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
456 if (IS_ERR(new)) {
457 status = PTR_ERR(new);
458 mlog_errno(status);
459 goto bail;
460 }
461 osb->root_inode = new;
462
463 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
464 if (IS_ERR(new)) {
465 status = PTR_ERR(new);
466 mlog_errno(status);
467 goto bail;
468 }
469 osb->sys_root_inode = new;
470
471 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
472 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
473 if (!ocfs2_need_system_inode(osb, i))
474 continue;
475 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
476 if (!new) {
477 ocfs2_release_system_inodes(osb);
478 status = -EINVAL;
479 mlog_errno(status);
480 /* FIXME: Should ERROR_RO_FS */
481 mlog(ML_ERROR, "Unable to load system inode %d, "
482 "possibly corrupt fs?", i);
483 goto bail;
484 }
485 // the array now has one ref, so drop this one
486 iput(new);
487 }
488
489 bail:
490 if (status)
491 mlog_errno(status);
492 return status;
493 }
494
495 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
496 {
497 struct inode *new = NULL;
498 int status = 0;
499 int i;
500
501 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
502 i < NUM_SYSTEM_INODES;
503 i++) {
504 if (!ocfs2_need_system_inode(osb, i))
505 continue;
506 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
507 if (!new) {
508 ocfs2_release_system_inodes(osb);
509 status = -EINVAL;
510 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
511 status, i, osb->slot_num);
512 goto bail;
513 }
514 /* the array now has one ref, so drop this one */
515 iput(new);
516 }
517
518 bail:
519 if (status)
520 mlog_errno(status);
521 return status;
522 }
523
524 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
525 {
526 int i;
527 struct inode *inode;
528
529 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
530 inode = osb->global_system_inodes[i];
531 if (inode) {
532 iput(inode);
533 osb->global_system_inodes[i] = NULL;
534 }
535 }
536
537 inode = osb->sys_root_inode;
538 if (inode) {
539 iput(inode);
540 osb->sys_root_inode = NULL;
541 }
542
543 inode = osb->root_inode;
544 if (inode) {
545 iput(inode);
546 osb->root_inode = NULL;
547 }
548
549 if (!osb->local_system_inodes)
550 return;
551
552 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
553 if (osb->local_system_inodes[i]) {
554 iput(osb->local_system_inodes[i]);
555 osb->local_system_inodes[i] = NULL;
556 }
557 }
558
559 kfree(osb->local_system_inodes);
560 osb->local_system_inodes = NULL;
561 }
562
563 /* We're allocating fs objects, use GFP_NOFS */
564 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
565 {
566 struct ocfs2_inode_info *oi;
567
568 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
569 if (!oi)
570 return NULL;
571
572 oi->i_sync_tid = 0;
573 oi->i_datasync_tid = 0;
574 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
575
576 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
577 return &oi->vfs_inode;
578 }
579
580 static void ocfs2_i_callback(struct rcu_head *head)
581 {
582 struct inode *inode = container_of(head, struct inode, i_rcu);
583 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
584 }
585
586 static void ocfs2_destroy_inode(struct inode *inode)
587 {
588 call_rcu(&inode->i_rcu, ocfs2_i_callback);
589 }
590
591 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
592 unsigned int cbits)
593 {
594 unsigned int bytes = 1 << cbits;
595 unsigned int trim = bytes;
596 unsigned int bitshift = 32;
597
598 /*
599 * i_size and all block offsets in ocfs2 are always 64 bits
600 * wide. i_clusters is 32 bits, in cluster-sized units. So on
601 * 64 bit platforms, cluster size will be the limiting factor.
602 */
603
604 #if BITS_PER_LONG == 32
605 # if defined(CONFIG_LBDAF)
606 BUILD_BUG_ON(sizeof(sector_t) != 8);
607 /*
608 * We might be limited by page cache size.
609 */
610 if (bytes > PAGE_CACHE_SIZE) {
611 bytes = PAGE_CACHE_SIZE;
612 trim = 1;
613 /*
614 * Shift by 31 here so that we don't get larger than
615 * MAX_LFS_FILESIZE
616 */
617 bitshift = 31;
618 }
619 # else
620 /*
621 * We are limited by the size of sector_t. Use block size, as
622 * that's what we expose to the VFS.
623 */
624 bytes = 1 << bbits;
625 trim = 1;
626 bitshift = 31;
627 # endif
628 #endif
629
630 /*
631 * Trim by a whole cluster when we can actually approach the
632 * on-disk limits. Otherwise we can overflow i_clusters when
633 * an extent start is at the max offset.
634 */
635 return (((unsigned long long)bytes) << bitshift) - trim;
636 }
637
638 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
639 {
640 int incompat_features;
641 int ret = 0;
642 struct mount_options parsed_options;
643 struct ocfs2_super *osb = OCFS2_SB(sb);
644 u32 tmp;
645
646 sync_filesystem(sb);
647
648 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
649 !ocfs2_check_set_options(sb, &parsed_options)) {
650 ret = -EINVAL;
651 goto out;
652 }
653
654 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
655 OCFS2_MOUNT_HB_NONE;
656 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
657 ret = -EINVAL;
658 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
659 goto out;
660 }
661
662 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
663 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
664 ret = -EINVAL;
665 mlog(ML_ERROR, "Cannot change data mode on remount\n");
666 goto out;
667 }
668
669 /* Probably don't want this on remount; it might
670 * mess with other nodes */
671 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
672 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
673 ret = -EINVAL;
674 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
675 goto out;
676 }
677
678 /* We're going to/from readonly mode. */
679 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
680 /* Disable quota accounting before remounting RO */
681 if (*flags & MS_RDONLY) {
682 ret = ocfs2_susp_quotas(osb, 0);
683 if (ret < 0)
684 goto out;
685 }
686 /* Lock here so the check of HARD_RO and the potential
687 * setting of SOFT_RO is atomic. */
688 spin_lock(&osb->osb_lock);
689 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
690 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
691 ret = -EROFS;
692 goto unlock_osb;
693 }
694
695 if (*flags & MS_RDONLY) {
696 sb->s_flags |= MS_RDONLY;
697 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
698 } else {
699 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
700 mlog(ML_ERROR, "Cannot remount RDWR "
701 "filesystem due to previous errors.\n");
702 ret = -EROFS;
703 goto unlock_osb;
704 }
705 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
706 if (incompat_features) {
707 mlog(ML_ERROR, "Cannot remount RDWR because "
708 "of unsupported optional features "
709 "(%x).\n", incompat_features);
710 ret = -EINVAL;
711 goto unlock_osb;
712 }
713 sb->s_flags &= ~MS_RDONLY;
714 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
715 }
716 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
717 unlock_osb:
718 spin_unlock(&osb->osb_lock);
719 /* Enable quota accounting after remounting RW */
720 if (!ret && !(*flags & MS_RDONLY)) {
721 if (sb_any_quota_suspended(sb))
722 ret = ocfs2_susp_quotas(osb, 1);
723 else
724 ret = ocfs2_enable_quotas(osb);
725 if (ret < 0) {
726 /* Return back changes... */
727 spin_lock(&osb->osb_lock);
728 sb->s_flags |= MS_RDONLY;
729 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
730 spin_unlock(&osb->osb_lock);
731 goto out;
732 }
733 }
734 }
735
736 if (!ret) {
737 /* Only save off the new mount options in case of a successful
738 * remount. */
739 osb->s_mount_opt = parsed_options.mount_opt;
740 osb->s_atime_quantum = parsed_options.atime_quantum;
741 osb->preferred_slot = parsed_options.slot;
742 if (parsed_options.commit_interval)
743 osb->osb_commit_interval = parsed_options.commit_interval;
744
745 if (!ocfs2_is_hard_readonly(osb))
746 ocfs2_set_journal_params(osb);
747
748 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
749 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
750 MS_POSIXACL : 0);
751 }
752 out:
753 return ret;
754 }
755
756 static int ocfs2_sb_probe(struct super_block *sb,
757 struct buffer_head **bh,
758 int *sector_size,
759 struct ocfs2_blockcheck_stats *stats)
760 {
761 int status, tmpstat;
762 struct ocfs1_vol_disk_hdr *hdr;
763 struct ocfs2_dinode *di;
764 int blksize;
765
766 *bh = NULL;
767
768 /* may be > 512 */
769 *sector_size = bdev_logical_block_size(sb->s_bdev);
770 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
771 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
772 *sector_size, OCFS2_MAX_BLOCKSIZE);
773 status = -EINVAL;
774 goto bail;
775 }
776
777 /* Can this really happen? */
778 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
779 *sector_size = OCFS2_MIN_BLOCKSIZE;
780
781 /* check block zero for old format */
782 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
783 if (status < 0) {
784 mlog_errno(status);
785 goto bail;
786 }
787 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
788 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
789 mlog(ML_ERROR, "incompatible version: %u.%u\n",
790 hdr->major_version, hdr->minor_version);
791 status = -EINVAL;
792 }
793 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
794 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
795 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
796 hdr->signature);
797 status = -EINVAL;
798 }
799 brelse(*bh);
800 *bh = NULL;
801 if (status < 0) {
802 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
803 "upgraded before mounting with ocfs v2\n");
804 goto bail;
805 }
806
807 /*
808 * Now check at magic offset for 512, 1024, 2048, 4096
809 * blocksizes. 4096 is the maximum blocksize because it is
810 * the minimum clustersize.
811 */
812 status = -EINVAL;
813 for (blksize = *sector_size;
814 blksize <= OCFS2_MAX_BLOCKSIZE;
815 blksize <<= 1) {
816 tmpstat = ocfs2_get_sector(sb, bh,
817 OCFS2_SUPER_BLOCK_BLKNO,
818 blksize);
819 if (tmpstat < 0) {
820 status = tmpstat;
821 mlog_errno(status);
822 break;
823 }
824 di = (struct ocfs2_dinode *) (*bh)->b_data;
825 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
826 spin_lock_init(&stats->b_lock);
827 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
828 if (tmpstat < 0) {
829 brelse(*bh);
830 *bh = NULL;
831 }
832 if (tmpstat != -EAGAIN) {
833 status = tmpstat;
834 break;
835 }
836 }
837
838 bail:
839 return status;
840 }
841
842 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
843 {
844 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
845
846 if (osb->s_mount_opt & hb_enabled) {
847 if (ocfs2_mount_local(osb)) {
848 mlog(ML_ERROR, "Cannot heartbeat on a locally "
849 "mounted device.\n");
850 return -EINVAL;
851 }
852 if (ocfs2_userspace_stack(osb)) {
853 mlog(ML_ERROR, "Userspace stack expected, but "
854 "o2cb heartbeat arguments passed to mount\n");
855 return -EINVAL;
856 }
857 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
858 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
859 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
860 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
861 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
862 return -EINVAL;
863 }
864 }
865
866 if (!(osb->s_mount_opt & hb_enabled)) {
867 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
868 !ocfs2_userspace_stack(osb)) {
869 mlog(ML_ERROR, "Heartbeat has to be started to mount "
870 "a read-write clustered device.\n");
871 return -EINVAL;
872 }
873 }
874
875 return 0;
876 }
877
878 /*
879 * If we're using a userspace stack, mount should have passed
880 * a name that matches the disk. If not, mount should not
881 * have passed a stack.
882 */
883 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
884 struct mount_options *mopt)
885 {
886 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
887 mlog(ML_ERROR,
888 "cluster stack passed to mount, but this filesystem "
889 "does not support it\n");
890 return -EINVAL;
891 }
892
893 if (ocfs2_userspace_stack(osb) &&
894 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
895 OCFS2_STACK_LABEL_LEN)) {
896 mlog(ML_ERROR,
897 "cluster stack passed to mount (\"%s\") does not "
898 "match the filesystem (\"%s\")\n",
899 mopt->cluster_stack,
900 osb->osb_cluster_stack);
901 return -EINVAL;
902 }
903
904 return 0;
905 }
906
907 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
908 {
909 int type;
910 struct super_block *sb = osb->sb;
911 unsigned int feature[OCFS2_MAXQUOTAS] = {
912 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
913 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
914 int status = 0;
915
916 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
917 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
918 continue;
919 if (unsuspend)
920 status = dquot_resume(sb, type);
921 else {
922 struct ocfs2_mem_dqinfo *oinfo;
923
924 /* Cancel periodic syncing before suspending */
925 oinfo = sb_dqinfo(sb, type)->dqi_priv;
926 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
927 status = dquot_suspend(sb, type);
928 }
929 if (status < 0)
930 break;
931 }
932 if (status < 0)
933 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
934 "remount (error = %d).\n", status);
935 return status;
936 }
937
938 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
939 {
940 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
941 struct super_block *sb = osb->sb;
942 unsigned int feature[OCFS2_MAXQUOTAS] = {
943 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
944 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
945 unsigned int ino[OCFS2_MAXQUOTAS] = {
946 LOCAL_USER_QUOTA_SYSTEM_INODE,
947 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
948 int status;
949 int type;
950
951 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
952 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
953 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
954 continue;
955 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
956 osb->slot_num);
957 if (!inode[type]) {
958 status = -ENOENT;
959 goto out_quota_off;
960 }
961 status = dquot_enable(inode[type], type, QFMT_OCFS2,
962 DQUOT_USAGE_ENABLED);
963 if (status < 0)
964 goto out_quota_off;
965 }
966
967 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
968 iput(inode[type]);
969 return 0;
970 out_quota_off:
971 ocfs2_disable_quotas(osb);
972 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
973 iput(inode[type]);
974 mlog_errno(status);
975 return status;
976 }
977
978 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
979 {
980 int type;
981 struct inode *inode;
982 struct super_block *sb = osb->sb;
983 struct ocfs2_mem_dqinfo *oinfo;
984
985 /* We mostly ignore errors in this function because there's not much
986 * we can do when we see them */
987 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
988 if (!sb_has_quota_loaded(sb, type))
989 continue;
990 /* Cancel periodic syncing before we grab dqonoff_mutex */
991 oinfo = sb_dqinfo(sb, type)->dqi_priv;
992 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
993 inode = igrab(sb->s_dquot.files[type]);
994 /* Turn off quotas. This will remove all dquot structures from
995 * memory and so they will be automatically synced to global
996 * quota files */
997 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
998 DQUOT_LIMITS_ENABLED);
999 if (!inode)
1000 continue;
1001 iput(inode);
1002 }
1003 }
1004
1005 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1006 {
1007 struct dentry *root;
1008 int status, sector_size;
1009 struct mount_options parsed_options;
1010 struct inode *inode = NULL;
1011 struct ocfs2_super *osb = NULL;
1012 struct buffer_head *bh = NULL;
1013 char nodestr[12];
1014 struct ocfs2_blockcheck_stats stats;
1015
1016 trace_ocfs2_fill_super(sb, data, silent);
1017
1018 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1019 status = -EINVAL;
1020 goto read_super_error;
1021 }
1022
1023 /* probe for superblock */
1024 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1025 if (status < 0) {
1026 mlog(ML_ERROR, "superblock probe failed!\n");
1027 goto read_super_error;
1028 }
1029
1030 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1031 osb = OCFS2_SB(sb);
1032 if (status < 0) {
1033 mlog_errno(status);
1034 goto read_super_error;
1035 }
1036 brelse(bh);
1037 bh = NULL;
1038
1039 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1040 status = -EINVAL;
1041 goto read_super_error;
1042 }
1043 osb->s_mount_opt = parsed_options.mount_opt;
1044 osb->s_atime_quantum = parsed_options.atime_quantum;
1045 osb->preferred_slot = parsed_options.slot;
1046 osb->osb_commit_interval = parsed_options.commit_interval;
1047
1048 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1049 osb->osb_resv_level = parsed_options.resv_level;
1050 osb->osb_dir_resv_level = parsed_options.resv_level;
1051 if (parsed_options.dir_resv_level == -1)
1052 osb->osb_dir_resv_level = parsed_options.resv_level;
1053 else
1054 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1055
1056 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1057 if (status)
1058 goto read_super_error;
1059
1060 sb->s_magic = OCFS2_SUPER_MAGIC;
1061
1062 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1063 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1064
1065 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1066 * heartbeat=none */
1067 if (bdev_read_only(sb->s_bdev)) {
1068 if (!(sb->s_flags & MS_RDONLY)) {
1069 status = -EACCES;
1070 mlog(ML_ERROR, "Readonly device detected but readonly "
1071 "mount was not specified.\n");
1072 goto read_super_error;
1073 }
1074
1075 /* You should not be able to start a local heartbeat
1076 * on a readonly device. */
1077 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1078 status = -EROFS;
1079 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1080 "device.\n");
1081 goto read_super_error;
1082 }
1083
1084 status = ocfs2_check_journals_nolocks(osb);
1085 if (status < 0) {
1086 if (status == -EROFS)
1087 mlog(ML_ERROR, "Recovery required on readonly "
1088 "file system, but write access is "
1089 "unavailable.\n");
1090 else
1091 mlog_errno(status);
1092 goto read_super_error;
1093 }
1094
1095 ocfs2_set_ro_flag(osb, 1);
1096
1097 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1098 "Cluster services will not be used for this mount. "
1099 "Recovery will be skipped.\n", osb->dev_str);
1100 }
1101
1102 if (!ocfs2_is_hard_readonly(osb)) {
1103 if (sb->s_flags & MS_RDONLY)
1104 ocfs2_set_ro_flag(osb, 0);
1105 }
1106
1107 status = ocfs2_verify_heartbeat(osb);
1108 if (status < 0) {
1109 mlog_errno(status);
1110 goto read_super_error;
1111 }
1112
1113 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1114 ocfs2_debugfs_root);
1115 if (!osb->osb_debug_root) {
1116 status = -EINVAL;
1117 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1118 goto read_super_error;
1119 }
1120
1121 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1122 osb->osb_debug_root,
1123 osb,
1124 &ocfs2_osb_debug_fops);
1125 if (!osb->osb_ctxt) {
1126 status = -EINVAL;
1127 mlog_errno(status);
1128 goto read_super_error;
1129 }
1130
1131 if (ocfs2_meta_ecc(osb)) {
1132 status = ocfs2_blockcheck_stats_debugfs_install(
1133 &osb->osb_ecc_stats,
1134 osb->osb_debug_root);
1135 if (status) {
1136 mlog(ML_ERROR,
1137 "Unable to create blockcheck statistics "
1138 "files\n");
1139 goto read_super_error;
1140 }
1141 }
1142
1143 status = ocfs2_mount_volume(sb);
1144 if (status < 0)
1145 goto read_super_error;
1146
1147 if (osb->root_inode)
1148 inode = igrab(osb->root_inode);
1149
1150 if (!inode) {
1151 status = -EIO;
1152 mlog_errno(status);
1153 goto read_super_error;
1154 }
1155
1156 root = d_make_root(inode);
1157 if (!root) {
1158 status = -ENOMEM;
1159 mlog_errno(status);
1160 goto read_super_error;
1161 }
1162
1163 sb->s_root = root;
1164
1165 ocfs2_complete_mount_recovery(osb);
1166
1167 if (ocfs2_mount_local(osb))
1168 snprintf(nodestr, sizeof(nodestr), "local");
1169 else
1170 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1171
1172 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1173 "with %s data mode.\n",
1174 osb->dev_str, nodestr, osb->slot_num,
1175 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1176 "ordered");
1177
1178 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1179 wake_up(&osb->osb_mount_event);
1180
1181 /* Now we can initialize quotas because we can afford to wait
1182 * for cluster locks recovery now. That also means that truncation
1183 * log recovery can happen but that waits for proper quota setup */
1184 if (!(sb->s_flags & MS_RDONLY)) {
1185 status = ocfs2_enable_quotas(osb);
1186 if (status < 0) {
1187 /* We have to err-out specially here because
1188 * s_root is already set */
1189 mlog_errno(status);
1190 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1191 wake_up(&osb->osb_mount_event);
1192 return status;
1193 }
1194 }
1195
1196 ocfs2_complete_quota_recovery(osb);
1197
1198 /* Now we wake up again for processes waiting for quotas */
1199 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1200 wake_up(&osb->osb_mount_event);
1201
1202 /* Start this when the mount is almost sure of being successful */
1203 ocfs2_orphan_scan_start(osb);
1204
1205 return status;
1206
1207 read_super_error:
1208 brelse(bh);
1209
1210 if (osb) {
1211 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1212 wake_up(&osb->osb_mount_event);
1213 ocfs2_dismount_volume(sb, 1);
1214 }
1215
1216 if (status)
1217 mlog_errno(status);
1218 return status;
1219 }
1220
1221 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1222 int flags,
1223 const char *dev_name,
1224 void *data)
1225 {
1226 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1227 }
1228
1229 static struct file_system_type ocfs2_fs_type = {
1230 .owner = THIS_MODULE,
1231 .name = "ocfs2",
1232 .mount = ocfs2_mount,
1233 .kill_sb = kill_block_super,
1234 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1235 .next = NULL
1236 };
1237 MODULE_ALIAS_FS("ocfs2");
1238
1239 static int ocfs2_check_set_options(struct super_block *sb,
1240 struct mount_options *options)
1241 {
1242 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1243 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1244 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1245 mlog(ML_ERROR, "User quotas were requested, but this "
1246 "filesystem does not have the feature enabled.\n");
1247 return 0;
1248 }
1249 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1250 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1251 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1252 mlog(ML_ERROR, "Group quotas were requested, but this "
1253 "filesystem does not have the feature enabled.\n");
1254 return 0;
1255 }
1256 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1257 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1258 mlog(ML_ERROR, "ACL support requested but extended attributes "
1259 "feature is not enabled\n");
1260 return 0;
1261 }
1262 /* No ACL setting specified? Use XATTR feature... */
1263 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1264 OCFS2_MOUNT_NO_POSIX_ACL))) {
1265 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1266 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1267 else
1268 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1269 }
1270 return 1;
1271 }
1272
1273 static int ocfs2_parse_options(struct super_block *sb,
1274 char *options,
1275 struct mount_options *mopt,
1276 int is_remount)
1277 {
1278 int status, user_stack = 0;
1279 char *p;
1280 u32 tmp;
1281
1282 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1283
1284 mopt->commit_interval = 0;
1285 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1286 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1287 mopt->slot = OCFS2_INVALID_SLOT;
1288 mopt->localalloc_opt = -1;
1289 mopt->cluster_stack[0] = '\0';
1290 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1291 mopt->dir_resv_level = -1;
1292
1293 if (!options) {
1294 status = 1;
1295 goto bail;
1296 }
1297
1298 while ((p = strsep(&options, ",")) != NULL) {
1299 int token, option;
1300 substring_t args[MAX_OPT_ARGS];
1301
1302 if (!*p)
1303 continue;
1304
1305 token = match_token(p, tokens, args);
1306 switch (token) {
1307 case Opt_hb_local:
1308 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1309 break;
1310 case Opt_hb_none:
1311 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1312 break;
1313 case Opt_hb_global:
1314 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1315 break;
1316 case Opt_barrier:
1317 if (match_int(&args[0], &option)) {
1318 status = 0;
1319 goto bail;
1320 }
1321 if (option)
1322 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1323 else
1324 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1325 break;
1326 case Opt_intr:
1327 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1328 break;
1329 case Opt_nointr:
1330 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1331 break;
1332 case Opt_err_panic:
1333 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1334 break;
1335 case Opt_err_ro:
1336 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1337 break;
1338 case Opt_data_ordered:
1339 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1340 break;
1341 case Opt_data_writeback:
1342 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1343 break;
1344 case Opt_user_xattr:
1345 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1346 break;
1347 case Opt_nouser_xattr:
1348 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1349 break;
1350 case Opt_atime_quantum:
1351 if (match_int(&args[0], &option)) {
1352 status = 0;
1353 goto bail;
1354 }
1355 if (option >= 0)
1356 mopt->atime_quantum = option;
1357 break;
1358 case Opt_slot:
1359 option = 0;
1360 if (match_int(&args[0], &option)) {
1361 status = 0;
1362 goto bail;
1363 }
1364 if (option)
1365 mopt->slot = (s16)option;
1366 break;
1367 case Opt_commit:
1368 option = 0;
1369 if (match_int(&args[0], &option)) {
1370 status = 0;
1371 goto bail;
1372 }
1373 if (option < 0)
1374 return 0;
1375 if (option == 0)
1376 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1377 mopt->commit_interval = HZ * option;
1378 break;
1379 case Opt_localalloc:
1380 option = 0;
1381 if (match_int(&args[0], &option)) {
1382 status = 0;
1383 goto bail;
1384 }
1385 if (option >= 0)
1386 mopt->localalloc_opt = option;
1387 break;
1388 case Opt_localflocks:
1389 /*
1390 * Changing this during remount could race
1391 * flock() requests, or "unbalance" existing
1392 * ones (e.g., a lock is taken in one mode but
1393 * dropped in the other). If users care enough
1394 * to flip locking modes during remount, we
1395 * could add a "local" flag to individual
1396 * flock structures for proper tracking of
1397 * state.
1398 */
1399 if (!is_remount)
1400 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1401 break;
1402 case Opt_stack:
1403 /* Check both that the option we were passed
1404 * is of the right length and that it is a proper
1405 * string of the right length.
1406 */
1407 if (((args[0].to - args[0].from) !=
1408 OCFS2_STACK_LABEL_LEN) ||
1409 (strnlen(args[0].from,
1410 OCFS2_STACK_LABEL_LEN) !=
1411 OCFS2_STACK_LABEL_LEN)) {
1412 mlog(ML_ERROR,
1413 "Invalid cluster_stack option\n");
1414 status = 0;
1415 goto bail;
1416 }
1417 memcpy(mopt->cluster_stack, args[0].from,
1418 OCFS2_STACK_LABEL_LEN);
1419 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1420 /*
1421 * Open code the memcmp here as we don't have
1422 * an osb to pass to
1423 * ocfs2_userspace_stack().
1424 */
1425 if (memcmp(mopt->cluster_stack,
1426 OCFS2_CLASSIC_CLUSTER_STACK,
1427 OCFS2_STACK_LABEL_LEN))
1428 user_stack = 1;
1429 break;
1430 case Opt_inode64:
1431 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1432 break;
1433 case Opt_usrquota:
1434 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1435 break;
1436 case Opt_grpquota:
1437 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1438 break;
1439 case Opt_coherency_buffered:
1440 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1441 break;
1442 case Opt_coherency_full:
1443 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1444 break;
1445 case Opt_acl:
1446 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1447 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1448 break;
1449 case Opt_noacl:
1450 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1451 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1452 break;
1453 case Opt_resv_level:
1454 if (is_remount)
1455 break;
1456 if (match_int(&args[0], &option)) {
1457 status = 0;
1458 goto bail;
1459 }
1460 if (option >= OCFS2_MIN_RESV_LEVEL &&
1461 option < OCFS2_MAX_RESV_LEVEL)
1462 mopt->resv_level = option;
1463 break;
1464 case Opt_dir_resv_level:
1465 if (is_remount)
1466 break;
1467 if (match_int(&args[0], &option)) {
1468 status = 0;
1469 goto bail;
1470 }
1471 if (option >= OCFS2_MIN_RESV_LEVEL &&
1472 option < OCFS2_MAX_RESV_LEVEL)
1473 mopt->dir_resv_level = option;
1474 break;
1475 case Opt_journal_async_commit:
1476 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1477 break;
1478 default:
1479 mlog(ML_ERROR,
1480 "Unrecognized mount option \"%s\" "
1481 "or missing value\n", p);
1482 status = 0;
1483 goto bail;
1484 }
1485 }
1486
1487 if (user_stack == 0) {
1488 /* Ensure only one heartbeat mode */
1489 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1490 OCFS2_MOUNT_HB_GLOBAL |
1491 OCFS2_MOUNT_HB_NONE);
1492 if (hweight32(tmp) != 1) {
1493 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1494 status = 0;
1495 goto bail;
1496 }
1497 }
1498
1499 status = 1;
1500
1501 bail:
1502 return status;
1503 }
1504
1505 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1506 {
1507 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1508 unsigned long opts = osb->s_mount_opt;
1509 unsigned int local_alloc_megs;
1510
1511 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1512 seq_printf(s, ",_netdev");
1513 if (opts & OCFS2_MOUNT_HB_LOCAL)
1514 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1515 else
1516 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1517 } else
1518 seq_printf(s, ",%s", OCFS2_HB_NONE);
1519
1520 if (opts & OCFS2_MOUNT_NOINTR)
1521 seq_printf(s, ",nointr");
1522
1523 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1524 seq_printf(s, ",data=writeback");
1525 else
1526 seq_printf(s, ",data=ordered");
1527
1528 if (opts & OCFS2_MOUNT_BARRIER)
1529 seq_printf(s, ",barrier=1");
1530
1531 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1532 seq_printf(s, ",errors=panic");
1533 else
1534 seq_printf(s, ",errors=remount-ro");
1535
1536 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1537 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1538
1539 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1540
1541 if (osb->osb_commit_interval)
1542 seq_printf(s, ",commit=%u",
1543 (unsigned) (osb->osb_commit_interval / HZ));
1544
1545 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1546 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1547 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1548
1549 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1550 seq_printf(s, ",localflocks,");
1551
1552 if (osb->osb_cluster_stack[0])
1553 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1554 osb->osb_cluster_stack);
1555 if (opts & OCFS2_MOUNT_USRQUOTA)
1556 seq_printf(s, ",usrquota");
1557 if (opts & OCFS2_MOUNT_GRPQUOTA)
1558 seq_printf(s, ",grpquota");
1559
1560 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1561 seq_printf(s, ",coherency=buffered");
1562 else
1563 seq_printf(s, ",coherency=full");
1564
1565 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1566 seq_printf(s, ",nouser_xattr");
1567 else
1568 seq_printf(s, ",user_xattr");
1569
1570 if (opts & OCFS2_MOUNT_INODE64)
1571 seq_printf(s, ",inode64");
1572
1573 if (opts & OCFS2_MOUNT_POSIX_ACL)
1574 seq_printf(s, ",acl");
1575 else
1576 seq_printf(s, ",noacl");
1577
1578 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1579 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1580
1581 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1582 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1583
1584 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1585 seq_printf(s, ",journal_async_commit");
1586
1587 return 0;
1588 }
1589
1590 static int __init ocfs2_init(void)
1591 {
1592 int status;
1593
1594 status = init_ocfs2_uptodate_cache();
1595 if (status < 0)
1596 goto out1;
1597
1598 status = ocfs2_initialize_mem_caches();
1599 if (status < 0)
1600 goto out2;
1601
1602 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1603 if (!ocfs2_wq) {
1604 status = -ENOMEM;
1605 goto out3;
1606 }
1607
1608 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1609 if (!ocfs2_debugfs_root) {
1610 status = -ENOMEM;
1611 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1612 goto out4;
1613 }
1614
1615 ocfs2_set_locking_protocol();
1616
1617 status = register_quota_format(&ocfs2_quota_format);
1618 if (status < 0)
1619 goto out4;
1620 status = register_filesystem(&ocfs2_fs_type);
1621 if (!status)
1622 return 0;
1623
1624 unregister_quota_format(&ocfs2_quota_format);
1625 out4:
1626 destroy_workqueue(ocfs2_wq);
1627 debugfs_remove(ocfs2_debugfs_root);
1628 out3:
1629 ocfs2_free_mem_caches();
1630 out2:
1631 exit_ocfs2_uptodate_cache();
1632 out1:
1633 mlog_errno(status);
1634 return status;
1635 }
1636
1637 static void __exit ocfs2_exit(void)
1638 {
1639 if (ocfs2_wq) {
1640 flush_workqueue(ocfs2_wq);
1641 destroy_workqueue(ocfs2_wq);
1642 }
1643
1644 unregister_quota_format(&ocfs2_quota_format);
1645
1646 debugfs_remove(ocfs2_debugfs_root);
1647
1648 ocfs2_free_mem_caches();
1649
1650 unregister_filesystem(&ocfs2_fs_type);
1651
1652 exit_ocfs2_uptodate_cache();
1653 }
1654
1655 static void ocfs2_put_super(struct super_block *sb)
1656 {
1657 trace_ocfs2_put_super(sb);
1658
1659 ocfs2_sync_blockdev(sb);
1660 ocfs2_dismount_volume(sb, 0);
1661 }
1662
1663 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1664 {
1665 struct ocfs2_super *osb;
1666 u32 numbits, freebits;
1667 int status;
1668 struct ocfs2_dinode *bm_lock;
1669 struct buffer_head *bh = NULL;
1670 struct inode *inode = NULL;
1671
1672 trace_ocfs2_statfs(dentry->d_sb, buf);
1673
1674 osb = OCFS2_SB(dentry->d_sb);
1675
1676 inode = ocfs2_get_system_file_inode(osb,
1677 GLOBAL_BITMAP_SYSTEM_INODE,
1678 OCFS2_INVALID_SLOT);
1679 if (!inode) {
1680 mlog(ML_ERROR, "failed to get bitmap inode\n");
1681 status = -EIO;
1682 goto bail;
1683 }
1684
1685 status = ocfs2_inode_lock(inode, &bh, 0);
1686 if (status < 0) {
1687 mlog_errno(status);
1688 goto bail;
1689 }
1690
1691 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1692
1693 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1694 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1695
1696 buf->f_type = OCFS2_SUPER_MAGIC;
1697 buf->f_bsize = dentry->d_sb->s_blocksize;
1698 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1699 buf->f_blocks = ((sector_t) numbits) *
1700 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1701 buf->f_bfree = ((sector_t) freebits) *
1702 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1703 buf->f_bavail = buf->f_bfree;
1704 buf->f_files = numbits;
1705 buf->f_ffree = freebits;
1706 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1707 & 0xFFFFFFFFUL;
1708 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1709 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1710
1711 brelse(bh);
1712
1713 ocfs2_inode_unlock(inode, 0);
1714 status = 0;
1715 bail:
1716 if (inode)
1717 iput(inode);
1718
1719 if (status)
1720 mlog_errno(status);
1721
1722 return status;
1723 }
1724
1725 static void ocfs2_inode_init_once(void *data)
1726 {
1727 struct ocfs2_inode_info *oi = data;
1728
1729 oi->ip_flags = 0;
1730 oi->ip_open_count = 0;
1731 spin_lock_init(&oi->ip_lock);
1732 ocfs2_extent_map_init(&oi->vfs_inode);
1733 INIT_LIST_HEAD(&oi->ip_io_markers);
1734 oi->ip_dir_start_lookup = 0;
1735 mutex_init(&oi->ip_unaligned_aio);
1736 init_rwsem(&oi->ip_alloc_sem);
1737 init_rwsem(&oi->ip_xattr_sem);
1738 mutex_init(&oi->ip_io_mutex);
1739
1740 oi->ip_blkno = 0ULL;
1741 oi->ip_clusters = 0;
1742
1743 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1744
1745 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1746 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1747 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1748
1749 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1750 &ocfs2_inode_caching_ops);
1751
1752 inode_init_once(&oi->vfs_inode);
1753 }
1754
1755 static int ocfs2_initialize_mem_caches(void)
1756 {
1757 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1758 sizeof(struct ocfs2_inode_info),
1759 0,
1760 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1761 SLAB_MEM_SPREAD),
1762 ocfs2_inode_init_once);
1763 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1764 sizeof(struct ocfs2_dquot),
1765 0,
1766 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1767 SLAB_MEM_SPREAD),
1768 NULL);
1769 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1770 sizeof(struct ocfs2_quota_chunk),
1771 0,
1772 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1773 NULL);
1774 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1775 !ocfs2_qf_chunk_cachep) {
1776 if (ocfs2_inode_cachep)
1777 kmem_cache_destroy(ocfs2_inode_cachep);
1778 if (ocfs2_dquot_cachep)
1779 kmem_cache_destroy(ocfs2_dquot_cachep);
1780 if (ocfs2_qf_chunk_cachep)
1781 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1782 return -ENOMEM;
1783 }
1784
1785 return 0;
1786 }
1787
1788 static void ocfs2_free_mem_caches(void)
1789 {
1790 /*
1791 * Make sure all delayed rcu free inodes are flushed before we
1792 * destroy cache.
1793 */
1794 rcu_barrier();
1795 if (ocfs2_inode_cachep)
1796 kmem_cache_destroy(ocfs2_inode_cachep);
1797 ocfs2_inode_cachep = NULL;
1798
1799 if (ocfs2_dquot_cachep)
1800 kmem_cache_destroy(ocfs2_dquot_cachep);
1801 ocfs2_dquot_cachep = NULL;
1802
1803 if (ocfs2_qf_chunk_cachep)
1804 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1805 ocfs2_qf_chunk_cachep = NULL;
1806 }
1807
1808 static int ocfs2_get_sector(struct super_block *sb,
1809 struct buffer_head **bh,
1810 int block,
1811 int sect_size)
1812 {
1813 if (!sb_set_blocksize(sb, sect_size)) {
1814 mlog(ML_ERROR, "unable to set blocksize\n");
1815 return -EIO;
1816 }
1817
1818 *bh = sb_getblk(sb, block);
1819 if (!*bh) {
1820 mlog_errno(-ENOMEM);
1821 return -ENOMEM;
1822 }
1823 lock_buffer(*bh);
1824 if (!buffer_dirty(*bh))
1825 clear_buffer_uptodate(*bh);
1826 unlock_buffer(*bh);
1827 ll_rw_block(READ, 1, bh);
1828 wait_on_buffer(*bh);
1829 if (!buffer_uptodate(*bh)) {
1830 mlog_errno(-EIO);
1831 brelse(*bh);
1832 *bh = NULL;
1833 return -EIO;
1834 }
1835
1836 return 0;
1837 }
1838
1839 static int ocfs2_mount_volume(struct super_block *sb)
1840 {
1841 int status = 0;
1842 int unlock_super = 0;
1843 struct ocfs2_super *osb = OCFS2_SB(sb);
1844
1845 if (ocfs2_is_hard_readonly(osb))
1846 goto leave;
1847
1848 status = ocfs2_dlm_init(osb);
1849 if (status < 0) {
1850 mlog_errno(status);
1851 goto leave;
1852 }
1853
1854 status = ocfs2_super_lock(osb, 1);
1855 if (status < 0) {
1856 mlog_errno(status);
1857 goto leave;
1858 }
1859 unlock_super = 1;
1860
1861 /* This will load up the node map and add ourselves to it. */
1862 status = ocfs2_find_slot(osb);
1863 if (status < 0) {
1864 mlog_errno(status);
1865 goto leave;
1866 }
1867
1868 /* load all node-local system inodes */
1869 status = ocfs2_init_local_system_inodes(osb);
1870 if (status < 0) {
1871 mlog_errno(status);
1872 goto leave;
1873 }
1874
1875 status = ocfs2_check_volume(osb);
1876 if (status < 0) {
1877 mlog_errno(status);
1878 goto leave;
1879 }
1880
1881 status = ocfs2_truncate_log_init(osb);
1882 if (status < 0)
1883 mlog_errno(status);
1884
1885 leave:
1886 if (unlock_super)
1887 ocfs2_super_unlock(osb, 1);
1888
1889 return status;
1890 }
1891
1892 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1893 {
1894 int tmp, hangup_needed = 0;
1895 struct ocfs2_super *osb = NULL;
1896 char nodestr[12];
1897
1898 trace_ocfs2_dismount_volume(sb);
1899
1900 BUG_ON(!sb);
1901 osb = OCFS2_SB(sb);
1902 BUG_ON(!osb);
1903
1904 debugfs_remove(osb->osb_ctxt);
1905
1906 /* Orphan scan should be stopped as early as possible */
1907 ocfs2_orphan_scan_stop(osb);
1908
1909 ocfs2_disable_quotas(osb);
1910
1911 /* All dquots should be freed by now */
1912 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1913 /* Wait for worker to be done with the work structure in osb */
1914 cancel_work_sync(&osb->dquot_drop_work);
1915
1916 ocfs2_shutdown_local_alloc(osb);
1917
1918 ocfs2_truncate_log_shutdown(osb);
1919
1920 /* This will disable recovery and flush any recovery work. */
1921 ocfs2_recovery_exit(osb);
1922
1923 ocfs2_journal_shutdown(osb);
1924
1925 ocfs2_sync_blockdev(sb);
1926
1927 ocfs2_purge_refcount_trees(osb);
1928
1929 /* No cluster connection means we've failed during mount, so skip
1930 * all the steps which depended on that to complete. */
1931 if (osb->cconn) {
1932 tmp = ocfs2_super_lock(osb, 1);
1933 if (tmp < 0) {
1934 mlog_errno(tmp);
1935 return;
1936 }
1937 }
1938
1939 if (osb->slot_num != OCFS2_INVALID_SLOT)
1940 ocfs2_put_slot(osb);
1941
1942 if (osb->cconn)
1943 ocfs2_super_unlock(osb, 1);
1944
1945 ocfs2_release_system_inodes(osb);
1946
1947 /*
1948 * If we're dismounting due to mount error, mount.ocfs2 will clean
1949 * up heartbeat. If we're a local mount, there is no heartbeat.
1950 * If we failed before we got a uuid_str yet, we can't stop
1951 * heartbeat. Otherwise, do it.
1952 */
1953 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1954 !ocfs2_is_hard_readonly(osb))
1955 hangup_needed = 1;
1956
1957 if (osb->cconn)
1958 ocfs2_dlm_shutdown(osb, hangup_needed);
1959
1960 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1961 debugfs_remove(osb->osb_debug_root);
1962
1963 if (hangup_needed)
1964 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1965
1966 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1967
1968 if (ocfs2_mount_local(osb))
1969 snprintf(nodestr, sizeof(nodestr), "local");
1970 else
1971 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1972
1973 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1974 osb->dev_str, nodestr);
1975
1976 ocfs2_delete_osb(osb);
1977 kfree(osb);
1978 sb->s_dev = 0;
1979 sb->s_fs_info = NULL;
1980 }
1981
1982 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1983 unsigned uuid_bytes)
1984 {
1985 int i, ret;
1986 char *ptr;
1987
1988 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1989
1990 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1991 if (osb->uuid_str == NULL)
1992 return -ENOMEM;
1993
1994 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1995 /* print with null */
1996 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1997 if (ret != 2) /* drop super cleans up */
1998 return -EINVAL;
1999 /* then only advance past the last char */
2000 ptr += 2;
2001 }
2002
2003 return 0;
2004 }
2005
2006 /* Make sure entire volume is addressable by our journal. Requires
2007 osb_clusters_at_boot to be valid and for the journal to have been
2008 initialized by ocfs2_journal_init(). */
2009 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2010 {
2011 int status = 0;
2012 u64 max_block =
2013 ocfs2_clusters_to_blocks(osb->sb,
2014 osb->osb_clusters_at_boot) - 1;
2015
2016 /* 32-bit block number is always OK. */
2017 if (max_block <= (u32)~0ULL)
2018 goto out;
2019
2020 /* Volume is "huge", so see if our journal is new enough to
2021 support it. */
2022 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2023 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2024 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2025 JBD2_FEATURE_INCOMPAT_64BIT))) {
2026 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2027 "Enable the 'block64' journal option with tunefs.ocfs2");
2028 status = -EFBIG;
2029 goto out;
2030 }
2031
2032 out:
2033 return status;
2034 }
2035
2036 static int ocfs2_initialize_super(struct super_block *sb,
2037 struct buffer_head *bh,
2038 int sector_size,
2039 struct ocfs2_blockcheck_stats *stats)
2040 {
2041 int status;
2042 int i, cbits, bbits;
2043 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2044 struct inode *inode = NULL;
2045 struct ocfs2_journal *journal;
2046 struct ocfs2_super *osb;
2047 u64 total_blocks;
2048
2049 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2050 if (!osb) {
2051 status = -ENOMEM;
2052 mlog_errno(status);
2053 goto bail;
2054 }
2055
2056 sb->s_fs_info = osb;
2057 sb->s_op = &ocfs2_sops;
2058 sb->s_d_op = &ocfs2_dentry_ops;
2059 sb->s_export_op = &ocfs2_export_ops;
2060 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2061 sb->dq_op = &ocfs2_quota_operations;
2062 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2063 sb->s_xattr = ocfs2_xattr_handlers;
2064 sb->s_time_gran = 1;
2065 sb->s_flags |= MS_NOATIME;
2066 /* this is needed to support O_LARGEFILE */
2067 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2068 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2069 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2070
2071 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2072
2073 for (i = 0; i < 3; i++)
2074 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2075 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2076
2077 osb->sb = sb;
2078 /* Save off for ocfs2_rw_direct */
2079 osb->s_sectsize_bits = blksize_bits(sector_size);
2080 BUG_ON(!osb->s_sectsize_bits);
2081
2082 spin_lock_init(&osb->dc_task_lock);
2083 init_waitqueue_head(&osb->dc_event);
2084 osb->dc_work_sequence = 0;
2085 osb->dc_wake_sequence = 0;
2086 INIT_LIST_HEAD(&osb->blocked_lock_list);
2087 osb->blocked_lock_count = 0;
2088 spin_lock_init(&osb->osb_lock);
2089 spin_lock_init(&osb->osb_xattr_lock);
2090 ocfs2_init_steal_slots(osb);
2091
2092 mutex_init(&osb->system_file_mutex);
2093
2094 atomic_set(&osb->alloc_stats.moves, 0);
2095 atomic_set(&osb->alloc_stats.local_data, 0);
2096 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2097 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2098 atomic_set(&osb->alloc_stats.bg_extends, 0);
2099
2100 /* Copy the blockcheck stats from the superblock probe */
2101 osb->osb_ecc_stats = *stats;
2102
2103 ocfs2_init_node_maps(osb);
2104
2105 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2106 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2107
2108 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2109 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2110 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2111 osb->max_slots);
2112 status = -EINVAL;
2113 goto bail;
2114 }
2115
2116 ocfs2_orphan_scan_init(osb);
2117
2118 status = ocfs2_recovery_init(osb);
2119 if (status) {
2120 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2121 mlog_errno(status);
2122 goto bail;
2123 }
2124
2125 init_waitqueue_head(&osb->checkpoint_event);
2126
2127 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2128
2129 osb->slot_num = OCFS2_INVALID_SLOT;
2130
2131 osb->s_xattr_inline_size = le16_to_cpu(
2132 di->id2.i_super.s_xattr_inline_size);
2133
2134 osb->local_alloc_state = OCFS2_LA_UNUSED;
2135 osb->local_alloc_bh = NULL;
2136 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2137
2138 init_waitqueue_head(&osb->osb_mount_event);
2139
2140 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2141 if (status) {
2142 mlog_errno(status);
2143 goto bail;
2144 }
2145
2146 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2147 if (!osb->vol_label) {
2148 mlog(ML_ERROR, "unable to alloc vol label\n");
2149 status = -ENOMEM;
2150 goto bail;
2151 }
2152
2153 osb->slot_recovery_generations =
2154 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2155 GFP_KERNEL);
2156 if (!osb->slot_recovery_generations) {
2157 status = -ENOMEM;
2158 mlog_errno(status);
2159 goto bail;
2160 }
2161
2162 init_waitqueue_head(&osb->osb_wipe_event);
2163 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2164 sizeof(*osb->osb_orphan_wipes),
2165 GFP_KERNEL);
2166 if (!osb->osb_orphan_wipes) {
2167 status = -ENOMEM;
2168 mlog_errno(status);
2169 goto bail;
2170 }
2171
2172 osb->osb_rf_lock_tree = RB_ROOT;
2173
2174 osb->s_feature_compat =
2175 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2176 osb->s_feature_ro_compat =
2177 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2178 osb->s_feature_incompat =
2179 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2180
2181 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2182 mlog(ML_ERROR, "couldn't mount because of unsupported "
2183 "optional features (%x).\n", i);
2184 status = -EINVAL;
2185 goto bail;
2186 }
2187 if (!(osb->sb->s_flags & MS_RDONLY) &&
2188 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2189 mlog(ML_ERROR, "couldn't mount RDWR because of "
2190 "unsupported optional features (%x).\n", i);
2191 status = -EINVAL;
2192 goto bail;
2193 }
2194
2195 if (ocfs2_clusterinfo_valid(osb)) {
2196 osb->osb_stackflags =
2197 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2198 strlcpy(osb->osb_cluster_stack,
2199 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2200 OCFS2_STACK_LABEL_LEN + 1);
2201 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2202 mlog(ML_ERROR,
2203 "couldn't mount because of an invalid "
2204 "cluster stack label (%s) \n",
2205 osb->osb_cluster_stack);
2206 status = -EINVAL;
2207 goto bail;
2208 }
2209 strlcpy(osb->osb_cluster_name,
2210 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2211 OCFS2_CLUSTER_NAME_LEN + 1);
2212 } else {
2213 /* The empty string is identical with classic tools that
2214 * don't know about s_cluster_info. */
2215 osb->osb_cluster_stack[0] = '\0';
2216 }
2217
2218 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2219
2220 /* FIXME
2221 * This should be done in ocfs2_journal_init(), but unknown
2222 * ordering issues will cause the filesystem to crash.
2223 * If anyone wants to figure out what part of the code
2224 * refers to osb->journal before ocfs2_journal_init() is run,
2225 * be my guest.
2226 */
2227 /* initialize our journal structure */
2228
2229 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2230 if (!journal) {
2231 mlog(ML_ERROR, "unable to alloc journal\n");
2232 status = -ENOMEM;
2233 goto bail;
2234 }
2235 osb->journal = journal;
2236 journal->j_osb = osb;
2237
2238 atomic_set(&journal->j_num_trans, 0);
2239 init_rwsem(&journal->j_trans_barrier);
2240 init_waitqueue_head(&journal->j_checkpointed);
2241 spin_lock_init(&journal->j_lock);
2242 journal->j_trans_id = (unsigned long) 1;
2243 INIT_LIST_HEAD(&journal->j_la_cleanups);
2244 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2245 journal->j_state = OCFS2_JOURNAL_FREE;
2246
2247 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2248 init_llist_head(&osb->dquot_drop_list);
2249
2250 /* get some pseudo constants for clustersize bits */
2251 osb->s_clustersize_bits =
2252 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2253 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2254
2255 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2256 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2257 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2258 osb->s_clustersize);
2259 status = -EINVAL;
2260 goto bail;
2261 }
2262
2263 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2264 le32_to_cpu(di->i_clusters));
2265
2266 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2267 total_blocks);
2268 if (status) {
2269 mlog(ML_ERROR, "Volume too large "
2270 "to mount safely on this system");
2271 status = -EFBIG;
2272 goto bail;
2273 }
2274
2275 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2276 sizeof(di->id2.i_super.s_uuid))) {
2277 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2278 status = -ENOMEM;
2279 goto bail;
2280 }
2281
2282 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2283 OCFS2_MAX_VOL_LABEL_LEN);
2284 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2285 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2286 osb->first_cluster_group_blkno =
2287 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2288 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2289 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2290 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2291 (unsigned long long)osb->root_blkno,
2292 (unsigned long long)osb->system_dir_blkno,
2293 osb->s_clustersize_bits);
2294
2295 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2296 if (!osb->osb_dlm_debug) {
2297 status = -ENOMEM;
2298 mlog_errno(status);
2299 goto bail;
2300 }
2301
2302 atomic_set(&osb->vol_state, VOLUME_INIT);
2303
2304 /* load root, system_dir, and all global system inodes */
2305 status = ocfs2_init_global_system_inodes(osb);
2306 if (status < 0) {
2307 mlog_errno(status);
2308 goto bail;
2309 }
2310
2311 /*
2312 * global bitmap
2313 */
2314 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2315 OCFS2_INVALID_SLOT);
2316 if (!inode) {
2317 status = -EINVAL;
2318 mlog_errno(status);
2319 goto bail;
2320 }
2321
2322 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2323 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2324 iput(inode);
2325
2326 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2327 osb->s_feature_incompat) * 8;
2328
2329 status = ocfs2_init_slot_info(osb);
2330 if (status < 0) {
2331 mlog_errno(status);
2332 goto bail;
2333 }
2334 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb);
2335
2336 bail:
2337 return status;
2338 }
2339
2340 /*
2341 * will return: -EAGAIN if it is ok to keep searching for superblocks
2342 * -EINVAL if there is a bad superblock
2343 * 0 on success
2344 */
2345 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2346 struct buffer_head *bh,
2347 u32 blksz,
2348 struct ocfs2_blockcheck_stats *stats)
2349 {
2350 int status = -EAGAIN;
2351
2352 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2353 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2354 /* We have to do a raw check of the feature here */
2355 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2356 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2357 status = ocfs2_block_check_validate(bh->b_data,
2358 bh->b_size,
2359 &di->i_check,
2360 stats);
2361 if (status)
2362 goto out;
2363 }
2364 status = -EINVAL;
2365 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2366 mlog(ML_ERROR, "found superblock with incorrect block "
2367 "size: found %u, should be %u\n",
2368 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2369 blksz);
2370 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2371 OCFS2_MAJOR_REV_LEVEL ||
2372 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2373 OCFS2_MINOR_REV_LEVEL) {
2374 mlog(ML_ERROR, "found superblock with bad version: "
2375 "found %u.%u, should be %u.%u\n",
2376 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2377 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2378 OCFS2_MAJOR_REV_LEVEL,
2379 OCFS2_MINOR_REV_LEVEL);
2380 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2381 mlog(ML_ERROR, "bad block number on superblock: "
2382 "found %llu, should be %llu\n",
2383 (unsigned long long)le64_to_cpu(di->i_blkno),
2384 (unsigned long long)bh->b_blocknr);
2385 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2386 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2387 mlog(ML_ERROR, "bad cluster size found: %u\n",
2388 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2389 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2390 mlog(ML_ERROR, "bad root_blkno: 0\n");
2391 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2392 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2393 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2394 mlog(ML_ERROR,
2395 "Superblock slots found greater than file system "
2396 "maximum: found %u, max %u\n",
2397 le16_to_cpu(di->id2.i_super.s_max_slots),
2398 OCFS2_MAX_SLOTS);
2399 } else {
2400 /* found it! */
2401 status = 0;
2402 }
2403 }
2404
2405 out:
2406 if (status && status != -EAGAIN)
2407 mlog_errno(status);
2408 return status;
2409 }
2410
2411 static int ocfs2_check_volume(struct ocfs2_super *osb)
2412 {
2413 int status;
2414 int dirty;
2415 int local;
2416 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2417 * recover
2418 * ourselves. */
2419
2420 /* Init our journal object. */
2421 status = ocfs2_journal_init(osb->journal, &dirty);
2422 if (status < 0) {
2423 mlog(ML_ERROR, "Could not initialize journal!\n");
2424 goto finally;
2425 }
2426
2427 /* Now that journal has been initialized, check to make sure
2428 entire volume is addressable. */
2429 status = ocfs2_journal_addressable(osb);
2430 if (status)
2431 goto finally;
2432
2433 /* If the journal was unmounted cleanly then we don't want to
2434 * recover anything. Otherwise, journal_load will do that
2435 * dirty work for us :) */
2436 if (!dirty) {
2437 status = ocfs2_journal_wipe(osb->journal, 0);
2438 if (status < 0) {
2439 mlog_errno(status);
2440 goto finally;
2441 }
2442 } else {
2443 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2444 "unmounted cleanly, recovering it.\n", osb->dev_str);
2445 }
2446
2447 local = ocfs2_mount_local(osb);
2448
2449 /* will play back anything left in the journal. */
2450 status = ocfs2_journal_load(osb->journal, local, dirty);
2451 if (status < 0) {
2452 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2453 goto finally;
2454 }
2455
2456 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2457 jbd2_journal_set_features(osb->journal->j_journal,
2458 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2459 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2460 else
2461 jbd2_journal_clear_features(osb->journal->j_journal,
2462 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2463 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2464
2465 if (dirty) {
2466 /* recover my local alloc if we didn't unmount cleanly. */
2467 status = ocfs2_begin_local_alloc_recovery(osb,
2468 osb->slot_num,
2469 &local_alloc);
2470 if (status < 0) {
2471 mlog_errno(status);
2472 goto finally;
2473 }
2474 /* we complete the recovery process after we've marked
2475 * ourselves as mounted. */
2476 }
2477
2478 status = ocfs2_load_local_alloc(osb);
2479 if (status < 0) {
2480 mlog_errno(status);
2481 goto finally;
2482 }
2483
2484 if (dirty) {
2485 /* Recovery will be completed after we've mounted the
2486 * rest of the volume. */
2487 osb->dirty = 1;
2488 osb->local_alloc_copy = local_alloc;
2489 local_alloc = NULL;
2490 }
2491
2492 /* go through each journal, trylock it and if you get the
2493 * lock, and it's marked as dirty, set the bit in the recover
2494 * map and launch a recovery thread for it. */
2495 status = ocfs2_mark_dead_nodes(osb);
2496 if (status < 0) {
2497 mlog_errno(status);
2498 goto finally;
2499 }
2500
2501 status = ocfs2_compute_replay_slots(osb);
2502 if (status < 0)
2503 mlog_errno(status);
2504
2505 finally:
2506 kfree(local_alloc);
2507
2508 if (status)
2509 mlog_errno(status);
2510 return status;
2511 }
2512
2513 /*
2514 * The routine gets called from dismount or close whenever a dismount on
2515 * volume is requested and the osb open count becomes 1.
2516 * It will remove the osb from the global list and also free up all the
2517 * initialized resources and fileobject.
2518 */
2519 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2520 {
2521 /* This function assumes that the caller has the main osb resource */
2522
2523 ocfs2_free_slot_info(osb);
2524
2525 kfree(osb->osb_orphan_wipes);
2526 kfree(osb->slot_recovery_generations);
2527 /* FIXME
2528 * This belongs in journal shutdown, but because we have to
2529 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2530 * we free it here.
2531 */
2532 kfree(osb->journal);
2533 kfree(osb->local_alloc_copy);
2534 kfree(osb->uuid_str);
2535 kfree(osb->vol_label);
2536 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2537 memset(osb, 0, sizeof(struct ocfs2_super));
2538 }
2539
2540 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2541 * panic(). We do not support continue-on-error operation. */
2542 static void ocfs2_handle_error(struct super_block *sb)
2543 {
2544 struct ocfs2_super *osb = OCFS2_SB(sb);
2545
2546 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2547 panic("OCFS2: (device %s): panic forced after error\n",
2548 sb->s_id);
2549
2550 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2551
2552 if (sb->s_flags & MS_RDONLY &&
2553 (ocfs2_is_soft_readonly(osb) ||
2554 ocfs2_is_hard_readonly(osb)))
2555 return;
2556
2557 printk(KERN_CRIT "File system is now read-only due to the potential "
2558 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2559 "system is unmounted.\n");
2560 sb->s_flags |= MS_RDONLY;
2561 ocfs2_set_ro_flag(osb, 0);
2562 }
2563
2564 static char error_buf[1024];
2565
2566 void __ocfs2_error(struct super_block *sb,
2567 const char *function,
2568 const char *fmt, ...)
2569 {
2570 va_list args;
2571
2572 va_start(args, fmt);
2573 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2574 va_end(args);
2575
2576 /* Not using mlog here because we want to show the actual
2577 * function the error came from. */
2578 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2579 sb->s_id, function, error_buf);
2580
2581 ocfs2_handle_error(sb);
2582 }
2583
2584 /* Handle critical errors. This is intentionally more drastic than
2585 * ocfs2_handle_error, so we only use for things like journal errors,
2586 * etc. */
2587 void __ocfs2_abort(struct super_block* sb,
2588 const char *function,
2589 const char *fmt, ...)
2590 {
2591 va_list args;
2592
2593 va_start(args, fmt);
2594 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2595 va_end(args);
2596
2597 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2598 sb->s_id, function, error_buf);
2599
2600 /* We don't have the cluster support yet to go straight to
2601 * hard readonly in here. Until then, we want to keep
2602 * ocfs2_abort() so that we can at least mark critical
2603 * errors.
2604 *
2605 * TODO: This should abort the journal and alert other nodes
2606 * that our slot needs recovery. */
2607
2608 /* Force a panic(). This stinks, but it's better than letting
2609 * things continue without having a proper hard readonly
2610 * here. */
2611 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2612 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2613 ocfs2_handle_error(sb);
2614 }
2615
2616 /*
2617 * Void signal blockers, because in-kernel sigprocmask() only fails
2618 * when SIG_* is wrong.
2619 */
2620 void ocfs2_block_signals(sigset_t *oldset)
2621 {
2622 int rc;
2623 sigset_t blocked;
2624
2625 sigfillset(&blocked);
2626 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2627 BUG_ON(rc);
2628 }
2629
2630 void ocfs2_unblock_signals(sigset_t *oldset)
2631 {
2632 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2633 BUG_ON(rc);
2634 }
2635
2636 module_init(ocfs2_init);
2637 module_exit(ocfs2_exit);
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